Finding the Third Proportional to 356,626 and 777,223.50

Step by Step Solution

1. Step 1: Write the proportion equation
   356,626 : 777,223.50 = 777,223.50 : x
2. Step 2: Convert to fraction form
   356,626/777,223.50 = 777,223.50/x
3. Step 3: Cross multiply
   356,626x = 777,223.50 × 777,223.50
4. Step 4: Simplify right side
   356,626x = 604,076,368,952.25
5. Step 5: Solve for x
   x = 604,076,368,952.25/356,626
6. Step 6: Final answer
   x = 1,693,865.19